Pneumatic operator for dental fluggers



, (No Model.) V

F. L. EAGER PNEUMATIC GPERATOR FOR I) No. 412,025;

ENTAL Pix mews.

Patented 0ct. 1,1889

NHED

FRANK L. iili'iiiit; ore-nannies, co

Ajiplioation film! June Q8, 1889.

To all whom it may concern.-

Be it known that I, FRANK 'L. EAGER, of-

Meridcn, in the count ofNew Haven and State of Connecticut, have invented anew im- 5 provementiin Pncmnatic Operators for Dent-ail and other Purposes; and i. do hereby declarethe following, when taken in connection with accompanying drnwin and the letters of refercnce marked thereon, U be it fun, clear, lllLi exact description of the some, and which sai'cldrewings constitute part of this sneciiicntiomend represent, in-

Figure 1', a top or plan View oi the ripperetus comp1et-e,,showing its commotion with it dental pluggerg-Fig. 2, a sectional side view I ofthc machine; Fig. 3,51, longitndiimlsection of a. dental plngger enlarged; Fig. iz, a longitudinal section of the piston cutting through the opening S therein; Fig. 5, a face View of the piston, showing the device for :t-iijnsting the opening throughihe piston; Fig. (i, a modification.

This invention relates to an apparatus for imparting a blow to instruments used by dentists in filling teeth, commonly called pluggcrs, but applicable to use upon other instrumcn ts where it variable blow is desirableohjieofiof'th'e invention being to employ an air-pump forimparting the blow, and to give to the piston ot the pump a. variable length of stroke, whereby the force of the blow-may be diminished or increnscd, occas on re quires; and it consists in the construction, as

35 hereinafter described, and perticnlnrly rccitecl in the claims.

A represents a cylinder provided at its respective ends with heads B (I. The eylindcr is best arranged u'pon trnnnions in hearings I), and so as to oscillate freely therein.

E represents the shaft, supported in been ings 'F F and carrying a, driving pnlley G, to which power is applied from any convenient sonrce. Preferably a loose pulley ii isialsoapplied as a con vcnience for throwing the power into or out of engagement, as occasion may require. c

The shaft E carries a crank 1, having a crank-pin J. Outside the crank a plate K is hung npon a pivot L above the crank, and so as to vibrate 1n eplane parallel with the erzinlc.

bra-vies under the action of the o fore described, it will impart a correspond as iiorengraying, chasing, carving, liver-the Serial No. 315.9%. (No 1110601.

The plate is constructed wi Lil it veriicnislot M, in which the crnnlopin works, and no ilmt in each throw of the crank kl i'uil vibration will be imported to the pin-1e as in fiicotod in broken lines, Fig. 2. in the plate i i a iong vertical. slot 1x", extending; from. nipoint above the pivot dowmmrd, preferably i ionic dis In the o lin'der A it ")iS'ijilli G m'rztniiocl L 1 v ircin which n piston-rod l on s, and. is hung in the slot iw' zind so that it may slide up and down therein, as indi in moi-ion lines Fi 3 and so that as the note ii vi- .nm, as ho ing reciprocating movement to the piston O, and the length of thcn'iovcnientol i hc'pieio will depend upon the position in xvi piston-rcd-stends in relation, to the on \Vi'iiCil the plate is iin-ngtlm" in the raised position, its movement will be substantially no-Unn or the minimum throw; but as the coon lotion between thepiston-rodnnfl the plnle is moved downward in the slot "rims to the position in dice-l ed in broken linegthcn the length of throw of the piston will be increased accordingly, as indicated in broken lines. V

A constant rotation is impart-ed to the crank, and while thus operating the cylinder may be turned by moons of an man ii, iii-- inched thereto, or otherwise so as to throw the connection with the piston-rod to diii'erent points in the length of the slot N, ihe more;

merit of the piston moving accordingly, and

the range of this variation of throw low .is only ugon the length of the :slor E it reiteir so as to slide freely up and ,tlown therein,

and so its to strike the heurlfof the iilS'iJlil' ment. 7 One Ul'jliOi'Q apertures {liti'fi i i-mid: i hciiveon the head f and the in 1121 ii: m or a 2 id head.

"blow of the lntinn'ier-will From the end. of the cylinder A a flexible tube it leads to the end of the handle a, and opening therein, as seen in Fig. 3. As the piston t) is drawn from the head through which the tube it opens, it. will suck or dran" the air from the handle of the instrument. above the hain'mer,.cansing the hamn'ier to rise. Then on the return-stroke of the piston the air will he forced into the handle and drive the hammer onto the-head ot' the instrmneni; with a force corresponding to the force applied from the (3 )'iiiltltfl'. if the- Stroke of the piston he very ,short, then the he eorreapondingly. short. If, however, the stroke of the piston. be increased, the power of the stroke of the han'imer' will be increased accordingly. Thehead of the cylinder opposite. the end through which thetube l1 opens is constructed -'With one or more openings 1', thri'mgh which the ai may freely enter or escape from that "Do the l IlHtOlhStl as to permit the free cl tion of the piston. ".-.'hi.i-..,- this apparatus is apeeially designed for dental 'pur 'ioses, itwill he nmicrratood that it. may he ufied. to good :ulvanta u;e for other worlgzm l'or engraving, chasing, or ('HiVillg' in atone or other material.

As an auxiliaryineanslorvarying-1hetori-ioi. the blow, the piston is C(Jllfitl'ilfliijtl with .an opening 5 through it, to both Hides oi the iston, and on the operating.sido of the pi ton a flap or other suitable ralx'e'l is arranged, which will. open as, the piston draws air through the tubo' /aand then will (lUfil'ElSllH pinion nurses in the o posing.dirruiion to iming on the side of the pinion uppmaiiir the. raire, an adjustaiihraliflia is hung, so as to rjwing close upon the fave oftho piston and aoroz'sa lhe opening', as indii'ated in vFig.5. 5, so that the size of the opening may in: varied. 'lhe result of this arrangement is that as the piston moves from tilt-"openingl'roi'n the tube lore described; but at the same time it will permit; air to pass through the openine'h', the

brate in a plainparallel with the axis of the opening for admission of air will only HCI'YQ to rei'lnre the power of suction throng-"h. tho tube 71. 'lln'nrioi'o as the opening- .5 is. ma-do larger or smaller the sucking-power oi. the piston through the tube 7: will. he corres 'iondingly diminihed minereased. 'lliiso 'ienii'igg is adjusted with relation to the work to he done, and, if. desired, the slide may be thrown over the opening, so as to completelyclose ii -While i prefer to employ the crank and slot M as a means for commnnieating the vihrre tory movement to the plate K, Lhat-mo'venient maybe otherwise communicated-as by apiij' man from the crank operating directly M10173 on, as seen in 0. Itlierel'ore do not wish to he understood as limiting'the invention to the particular means lorprodneing the \'iln'atory movement of the said plate i\'..

1. The eoxnhinaliiim of the ()llli'itfl' A, piaton U, iiria-ing 'e l therein, plate lx", hung to w cylinder a nloi. in said plate in a line at suin- Sl'ill'liiall) rig-hi anglrn in the axinol. Haidtgrlinder, piston-rod l, extending from the pi!- .ton and ailjnslahly lilillg in the said slot N oi. the plate h, and nnwhanirnn,mihslantiall sin-h as (h-m-riln-d, to impart vihraiing; iiz i an men! to paid plain. will: a tube leading from. one end of llli rylimler, snhstaniiallg. as. do si-rilwd,

-';.l slots M and a piston t) in thee /"l" pirstoierod l, '.\'1i i)1llii;[ from the pinto" ailinslalily iliillgJj in said slot N, ar (rank l, its erank-pin .l \Yorhillf: in Mi .\l of ihe plate l\', with a LillH: leadine jonr head of lhr erlinder, anhsmniinlly a--- ii part the i)lU\'\'.. '.lo vary the size of ihiaopi-ir E ism,pnilistantially such ma do ined,1'oi-inisaid piati,

IUD paiti'ng'ri ii'ory movement substantially as speeilied. 

